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| Mirrors > Home > MPE Home > Th. List > rng2idlsubgsubrng | Structured version Visualization version GIF version | ||
| Description: A two-sided ideal of a non-unital ring which is a subgroup of the ring is a subring of the ring. (Contributed by AV, 11-Mar-2025.) |
| Ref | Expression |
|---|---|
| rng2idlsubgsubrng.r | ⊢ (𝜑 → 𝑅 ∈ Rng) |
| rng2idlsubgsubrng.i | ⊢ (𝜑 → 𝐼 ∈ (2Ideal‘𝑅)) |
| rng2idlsubgsubrng.u | ⊢ (𝜑 → 𝐼 ∈ (SubGrp‘𝑅)) |
| Ref | Expression |
|---|---|
| rng2idlsubgsubrng | ⊢ (𝜑 → 𝐼 ∈ (SubRng‘𝑅)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rng2idlsubgsubrng.r | . 2 ⊢ (𝜑 → 𝑅 ∈ Rng) | |
| 2 | rng2idlsubgsubrng.i | . 2 ⊢ (𝜑 → 𝐼 ∈ (2Ideal‘𝑅)) | |
| 3 | eqid 2763 | . . . . . 6 ⊢ (LIdeal‘𝑅) = (LIdeal‘𝑅) | |
| 4 | eqid 2763 | . . . . . 6 ⊢ (oppr‘𝑅) = (oppr‘𝑅) | |
| 5 | eqid 2763 | . . . . . 6 ⊢ (LIdeal‘(oppr‘𝑅)) = (LIdeal‘(oppr‘𝑅)) | |
| 6 | eqid 2763 | . . . . . 6 ⊢ (2Ideal‘𝑅) = (2Ideal‘𝑅) | |
| 7 | 3, 4, 5, 6 | 2idlelb 21330 | . . . . 5 ⊢ (𝐼 ∈ (2Ideal‘𝑅) ↔ (𝐼 ∈ (LIdeal‘𝑅) ∧ 𝐼 ∈ (LIdeal‘(oppr‘𝑅)))) |
| 8 | 7 | simplbi 500 | . . . 4 ⊢ (𝐼 ∈ (2Ideal‘𝑅) → 𝐼 ∈ (LIdeal‘𝑅)) |
| 9 | 2, 8 | syl 17 | . . 3 ⊢ (𝜑 → 𝐼 ∈ (LIdeal‘𝑅)) |
| 10 | rng2idlsubgsubrng.u | . . 3 ⊢ (𝜑 → 𝐼 ∈ (SubGrp‘𝑅)) | |
| 11 | eqid 2763 | . . . 4 ⊢ (𝑅 ↾s 𝐼) = (𝑅 ↾s 𝐼) | |
| 12 | 3, 11 | rnglidlrng 21324 | . . 3 ⊢ ((𝑅 ∈ Rng ∧ 𝐼 ∈ (LIdeal‘𝑅) ∧ 𝐼 ∈ (SubGrp‘𝑅)) → (𝑅 ↾s 𝐼) ∈ Rng) |
| 13 | 1, 9, 10, 12 | syl3anc 1392 | . 2 ⊢ (𝜑 → (𝑅 ↾s 𝐼) ∈ Rng) |
| 14 | 1, 2, 13 | rng2idlsubrng 21342 | 1 ⊢ (𝜑 → 𝐼 ∈ (SubRng‘𝑅)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2143 ‘cfv 6521 (class class class)co 7396 ↾s cress 17276 SubGrpcsubg 19172 Rngcrng 20208 opprcoppr 20395 SubRngcsubrng 20605 LIdealclidl 21283 2Idealc2idl 21326 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1816 ax-4 1830 ax-5 1931 ax-6 1988 ax-7 2029 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-rep 5228 ax-sep 5247 ax-nul 5257 ax-pow 5323 ax-pr 5391 ax-un 7718 ax-cnex 11140 ax-resscn 11141 ax-1cn 11142 ax-icn 11143 ax-addcl 11144 ax-addrcl 11145 ax-mulcl 11146 ax-mulrcl 11147 ax-mulcom 11148 ax-addass 11149 ax-mulass 11150 ax-distr 11151 ax-i2m1 11152 ax-1ne0 11153 ax-1rid 11154 ax-rnegex 11155 ax-rrecex 11156 ax-cnre 11157 ax-pre-lttri 11158 ax-pre-lttrn 11159 ax-pre-ltadd 11160 ax-pre-mulgt0 11161 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1100 df-3an 1101 df-tru 1564 df-fal 1574 df-ex 1801 df-nf 1805 df-sb 2092 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3368 df-reu 3369 df-rab 3416 df-v 3457 df-sbc 3746 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-iun 4952 df-br 5102 df-opab 5164 df-mpt 5183 df-tr 5209 df-id 5543 df-eprel 5548 df-po 5556 df-so 5557 df-fr 5601 df-we 5603 df-xp 5654 df-rel 5655 df-cnv 5656 df-co 5657 df-dm 5658 df-rn 5659 df-res 5660 df-ima 5661 df-pred 6288 df-ord 6349 df-on 6350 df-lim 6351 df-suc 6352 df-iota 6477 df-fun 6523 df-fn 6524 df-f 6525 df-f1 6526 df-fo 6527 df-f1o 6528 df-fv 6529 df-riota 7353 df-ov 7399 df-oprab 7400 df-mpo 7401 df-om 7847 df-2nd 7971 df-frecs 8262 df-wrecs 8293 df-recs 8342 df-rdg 8381 df-er 8678 df-en 8928 df-dom 8929 df-sdom 8930 df-pnf 11229 df-mnf 11230 df-xr 11231 df-ltxr 11232 df-le 11233 df-sub 11427 df-neg 11428 df-nn 12221 df-2 12290 df-3 12291 df-4 12292 df-5 12293 df-6 12294 df-7 12295 df-8 12296 df-sets 17210 df-slot 17228 df-ndx 17240 df-base 17256 df-ress 17277 df-plusg 17309 df-mulr 17310 df-sca 17312 df-vsca 17313 df-ip 17314 df-0g 17480 df-mgm 18684 df-sgrp 18763 df-mnd 18779 df-grp 18988 df-subg 19175 df-cmn 19832 df-abl 19833 df-mgp 20197 df-rng 20209 df-subrng 20606 df-lss 21006 df-sra 21247 df-rgmod 21248 df-lidl 21285 df-2idl 21327 |
| This theorem is referenced by: rng2idlsubgnsg 21346 rng2idlsubg0 21347 |
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